<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleDialogVisible=true" class="addRole">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染for循环 -->
                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3,i3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightByid()">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="editRole(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteRole(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形空间 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addRoleDialogClosed">
      <el-form :model="addRoleform" label-width="80px" :rules="rules" ref="addRoleFormRef">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleform.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addRoleform.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色信息对话框 -->
    <el-dialog :title="dialogTitle" :visible.sync="dialogVisible" width="50%" fullscreen :before-close="handleClose">
      <router-view @changeTitle="changeTitle($event)" @refs="setRefs($event)" :id="roleId" @close="closeDialog($event)" :ref="refs"></router-view>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点id值数组
      defKeys: [105, 116],
      // 所选的角色的id
      roleId: '',
      // 控制新增角色对话框的显示与隐藏
      addRoleDialogVisible: false,
      // 新增角色的form表单数据存储
      addRoleform: {
        roleName: '',
        roleDesc: ''
      },
      // 新增角色规则
      rules: {
        roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ]
      },
      dialogVisible: false,
      // 对话框的标题
      dialogTitle: '',
      refs: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.roleList = res.data
    },
    // 添加角色
    addRole() {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return
        // 发起添加角色的请求
        console.log(this.addRoleform)
        const { data: res } = await this.$http.post('roles', this.addRoleform)
        console.log(res)

      if (res.meta.status !== 201) {
        return this.$message.error('添加角色失败！')
      }
      this.$message.success('添加角色成功！')
      })
      this.addRoleDialogVisible = false
      this.getRolesList()
    },
    // 监听添加角色对话框的关闭事件
    addRoleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
      this.addRoleform.roleDesc = ''
    },
    // 编辑角色
    editRole(userInfo) {
      console.log(userInfo)
      this.roleId = userInfo
      this.dialogVisible = true
      this.$router.push({
        name: 'EditRole'
      })
      if (this.refs === 'editRoleRef') {
        this.$refs.editRoleRef.getRoles(userInfo)
      }
      // console.log('编辑角色')
    },
    // 删除角色
    deleteRole(userInfo) {
      console.log('删除角色')
      console.log(userInfo)
      const that = this
      this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(async () => {
          const { data: res } = await this.$http.delete('roles/' + userInfo)
          if (res.meta.status !== 200) {
            return this.$message({
            type: 'fail',
            message: '删除失败!'
          })
          }
          that.getRolesList()
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
    },
    // 根据id删除对应的权限
    async removeRightByid() {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }
        console.log('确认了删除')
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.roleId = role.id
      this.rightslist = res.data
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前节点不包含children,则是三级属性
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
      ...this.$refs.treeRef.getCheckedKeys(),
      ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    closeDialog(e) {
      this.dialogVisible = e
      this.getRolesList()
    },
    // 修改对话框标题
    changeTitle(e) {
      const that = this
      that.dialogTitle = e
    },
    // 获取子组件传递的refs
    setRefs(e) {
      this.refs = e
      console.log(this.refs)
    },
    // 关闭对话框时的事件
    handleClose() {
      if (this.refs === 'editRoleRef') {
        this.$refs.editRoleRef.closeDialog()
        console.log('启动了子组件的关闭函数')
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top:1px solid #eee
}
.bdbottom{
  border-bottom:1px solid #eee
}
.vcenter{
  display: flex;
  align-items: center;
}
.addRole{
  margin-bottom: 15px;
}
</style>
